Did man-made modifications to Conewago Canal and Tennessee–Tombigbee Waterway assist in navigating these passages?
yes
-1
Section::::Abstract.
Conewago Canal
14307410
-1
Section::::Abstract.
Conewago Canal
14307410
-1
Section::::Abstract.
Conewago Canal
14307410
-1
Section::::Abstract.
Tennessee–Tombigbee Waterway
1669726
-1
Section::::Abstract.
Tennessee–Tombigbee Waterway
1669726